Pulp caster-wheel



I UNIT D STATES PATENT- OFFICE.

WALTER S. RAVENSGROFT, OF PABKERSBURG, WEST VIRGINIA.

PULP CASTER-WH EEL.

SPECIFICATION forming part of Letters Patent No. 293,784, dated February19, 1884 I Application filed April 23, 1883. (No specimens.)

ticle, or coloring-matter may be added and incorporated therewith togive to the mass the proper tint or color. I may also mix with the pulpa suitable proportion of earthy material or resinous substances, or gluemay be added,

toharden and cause the material to adhere more firmly together. The pulpthus prepared is put into amold of the desired form and subjected toheavy pressure, the molds being provided with minute apertures, to admitof the escape of water or other moisture when the pulp is formed intothe desired shape in a moist or wet condition. The articles, whenformed, are taken from the mold, thoroughly dried by any suitable dryingmedium, and then coated or saturated with boiled linseedoil or othersuitable material, so as to give the article the desired finish. Thearticle is formed with the usual central perforation, to receive the pinof the castings by which the caster is secured to chairs, tables, &c.,as is usual, and a bushing of metal or other suitable material may besecured in the perforation during the process of molding the article orafterward, as may be desired.

I have described the article as made from wet pulp; but I do not wish tolimit myself 'to such, as I may press the pulp in a dry or comparativelydry state into the form desired by subjecting it to sufficient pressure.The pulp may also be mixed with powdered glue or other adhesive materialin a dry state, and thensubjected to pressure under heat, which willcause the particles to adhere firmly together.

I am aware that it is not new to construct a pulley-wheel of layers ordisks of paper or pasteboard forming the web, and other layerssurrounding the web to form the rim, the whole being solidified bypressure, and such I do not claim.

Having thus described my invention, what I claim, and desire to secureby Letters Patent,

As a new article of manufacture, a casterwheel made of paper or woodpulp, asset forth.

WALTER S. RAVENSGROFTJ Witnesses:

- M. A. BROWN,

DANE D. J oHNso v.

